Error message

An error message is information displayed when an unexpected condition occurs, usually on a computer or other device. On modern operating systems with graphical user interfaces, error messages are often displayed using dialog boxes. Error messages are used when user intervention is required, to indicate that a desired operation has failed, or to relay important warnings (such as warning a computer user that they are almost out of hard disk space). Error messages are seen widely throughout computing, and are part of every operating system or computer hardware device. Proper design of error messages is an important topic in usability and other fields of human–computer interaction.

Common error messages

The following error messages are commonly seen by modern computer users:

Infamous error messages

Abort, Retry, Fail? - A notoriously confusing error message seen in MS-DOS

An example of an Error message .vbs script

HTTP 403

A web server may return a 403 Forbidden HTTP status code in response to a request from a client for a web page or resource to indicate that the server can be reached and understood the request, but refuses to take any further action. Status code 403 responses are the result of the web server being configured to deny access, for some reason, to the requested resource by the client.

A typical request that may receive a 403 Forbidden response is a GET for a web page, performed by a web browser to retrieve the page for display to a user in a browser window. The web server may return a 403 Forbidden status for other types of requests as well.

The Apache web server returns 403 Forbidden in response to requests for url paths that correspond to filesystem directories, when directory listings have been disabled in the server and there is no Directory Index directive to specify an existing file to be returned to the browser. Some administrators configure the Mod proxy extension to Apache to block such requests, and this will also return 403 Forbidden. Microsoft IIS responds in the same way when directory listings are denied in that server. In WebDAV, the 403 Forbidden response will be returned by the server if the client issued a PROPFIND request but did not also issue the required Depth header, or issued a Depth header of infinity.

HTTP 404

The 404 or Not Found error message is an HTTP standard response code indicating that the client was able to communicate with a given server, but the server could not find what was requested.

The web site hosting server will typically generate a "404 Not Found" web page when a user attempts to follow a broken or dead link; hence the 404 error is one of the most recognizable errors encountered on the World Wide Web.

Overview

When communicating via HTTP, a server is required to respond to a request, such as a web browser request for a web page, with a numeric response code and an optional, mandatory, or disallowed (based upon the status code) message. In the code 404, the first digit indicates a client error, such as a mistyped Uniform Resource Locator (URL). The following two digits indicate the specific error encountered. HTTP's use of three-digit codes is similar to the use of such codes in earlier protocols such as FTP and NNTP.

At the HTTP level, a 404 response code is followed by a human-readable "reason phrase". The HTTP specification suggests the phrase "Not Found" and many web servers by default issue an HTML page that includes both the 404 code and the "Not Found" phrase.

Untitled (Selections from 12)

Untitled (Selections From 12) is a 1997 promotional-only EP from German band The Notwist which was released exclusively in the United States. Though the release of the EP was primarily to promote the band's then-current album 12, it contains one track from their 1992 second record Nook as well as the non-album cover of Robert Palmer's "Johnny and Mary". The version of "Torture Day" on this EP features the vocals of Cindy Dall.

Track listing

Untitled (West)

Untitled is an outdoor 1977 stainless steel sculpture by American artist Bruce West, installed in Portland, Oregon, in the United States.

Description

Bruce West's Untitled is installed along Southwest 6th Avenue between Washington and Stark streets in Portland's Transit Mall. It was one of eleven works chosen in 1977 to make the corridor "more people oriented and attractive" as part of the Portland Transit Mall Art Project. The stainless steel sculptures is 7 feet (2.1 m) tall. It was funded by TriMet and the United States Department of Transportation, and is administered by the Regional Arts & Culture Council.

See also

References

External links

Untitled (Kelly, 1975)

Untitled is an outdoor 1975 sculpture by Lee Kelly, installed at Louisa Boren Park in Seattle, Washington, in the United States. The abstract, welded Cor-Ten steel piece measures approximately 19 feet (5.8 m) x 14 feet (4.3 m) x 10 feet (3.0 m). It was surveyed and deemed "treatment needed" by the Smithsonian Institution's "Save Outdoor Sculpture!" program in November 1994. The work is part of the Seattle One Percent for Art Collection and administered by the Seattle Arts Commission.

References

Further reading